* {
    margin: 0;
    padding: 0;
}

html {
    width: 100%;
    height: 100%;
}

body {
    height: 100%;
    width: 100%;
    display: flex;
    flex-direction: column;
}

// 头部
header {
    height: 60px;
    width: 100%;
    font-size: 17px;
    line-height: 80px;
    background: #fff;
    justify-content: center;
    display: flex;
}


//   背景图
main {
    width: 100%;
    height: 100%;
    background: url('../../assets/imgs/04ed57.jpg') no-repeat;
    background-size: cover;
    position: relative;

    .hold {
        color: #fff;
        font-size: 40px;
        font-weight: bold;
        position: absolute;
        bottom: 65px;
        left: 50%;
        transform: translate(-50%);
        animation: word 1.3s linear;
    }
}

@keyframes word {
    0% {
        // 不透明度 越小越不明显
        opacity: 0;
        bottom: 300px;
        font-size: 0;
    }

    25% {
        bottom: 230px;
    }

    75% {
        bottom: 30px;
    }

    100% {
        bottom: 65px;
    }
}

.Jump {
    width: 105px;
    height: 40px;
    background-color: #fff;
    border-radius: 20px;
    text-align: center;
    line-height: 40px;
    position: relative;
    left: 68%;
    top: 30px;
}

.Jump-left {
    width: 16px;
    height: 20px;
    color: rgba(16, 16, 16, 1);
    font-size: 18px;
}

.Jump-right {
    left: 352px;
    top: 126px;
    width: 28px;
    height: 20px;
    color: rgba(16, 16, 16, 1);
    font-size: 18px;
}